OFA will record any and all DNA test results from accredited laboratories, as far as I know. Some people are also testing for DM, although I believe that is very rare in Goldens. I believe the fee is $15 (though I haven't checked recently), www.GoldenDNA.org is at no charge (it depends on voluntary donations).
It would be tremendously valuable, I think, for us to keep track of the physical symptoms of ICT for future reference. Until now, people (including vets) simply haven't been familiar enough with the disease. If we are to know whether we can make symptoms worse by our breeding choices, we will only learn this if we collect the data. I'm not exactly sure how we can do that in an organized fashion so that the data can be most useful.
What we are learning is that DNA testing is not "the answer" to our problems. It is a "tool" to use in making breeding choices that minimize the probability of producing animals affected with diseases that can predictably affect the dog's quality of life. It has not removed any of the many variables we were already balancing in our breeding assessments ... it has just added more variables to consider in each breeding.
I begin to imagine that one day all breeders will have computer software to compute all this stuff ... much like k9data does with COIs.